Pros:
im using this adapter in my car so that i can listen to music via the aux port of my radio an still charge the phone
this is especially nice when i use my phone as navigator because of the high power consumption of the gps module
it just does what its meant to do without having other wierd options that olny get in the way of working properly
its nice and small so you can use it in almost every place you want car, pocket, in doors, etc